On Monday 03 March 2008, mahendra varman wrote:> >> > Now as to *why* that happens, I don't know. We've certainly had folk> > using Philips/NXP EHCI controllers successfully before. Maybe this> > board has a hardware problem, like a bad chip or not having wired> > up the power lines that OHCI controller uses.> > still the low speed devices are giving unlink after no IRQ..

Not at all surprising if you haven't changed anything.

You *did* verify this happens on all the ports of that chip?

> My > hardware engineer says he followed the reference schematics of ISP1562> of philips. He says that ohci side, the power lines are wired up> > My Ehci devices can be mounted and the files are read> Today I faced another issue> For some usb ehci devices its giving "device descriptor read/64, error> -71" ( for some usb stick of usb2.0)> but for others i can able to mount without this error.....> > Sir, Any clue regarding the above problem iam facing currently ??

I gave you all the clues I've got. You're the one with theuniquely mis-behaving hardware...

Time for you to work harder at debugging your problem. Youhave the hardware, the software source code, a cooperativehardware engineer ... that's a lot more than most folk havewhen they start to chase down problems like this.